Comparison of Detection Limits in Atomic Spectroscopic Methods of Analysis

Epstein, Michael

doi:10.1021/bk-1988-0361.ch006

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…Detection limits based on the IUPAC de"nition of 3 times the standard deviation of the blank (3 ) serve as a measure of detection capability (Epstein, 1987). FCL does not report values (5 times the detection limit (or 15 ) which is de"ned as the quantitation limit.…”

Section: Trace Element Composition Of Municipal Watersmentioning

confidence: 99%

Trace Element Composition of Municipal Waters in the United States: A Comparison of ICP-AES and ICP-MS Methods

Miller-Ihli

Baker

2001

Journal of Food Composition and Analysis

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Section: Trace Element Composition Of Municipal Watersmentioning

confidence: 99%

Trace Element Composition of Municipal Waters in the United States: A Comparison of ICP-AES and ICP-MS Methods

Miller-Ihli

Baker

2001

Journal of Food Composition and Analysis

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“…One particular strategy is the Plackett-Burman design, which studies up to k = N -1 factors in N runs, where N is a multiple of 4 [26]. The Plackett-Burman design assumes that interaction between factors can be ignored so the main effects can be calculated with a LOD and LOQ were determined for the proposed method including RP-DLLME and electrochemical detection, therefore, they are referred to as methodological LOD (mLOD) and mLOQ, respectively [27]. mLOD was empirically determined measuring progressively more diluted concentrations of caffeic acid and tyrosol.…”

Section: Rp-dllme Multivariate Optimizationmentioning

confidence: 99%

Rapid determination of hydrophilic phenols in olive oil by vortex-assisted reversed-phase dispersive liquid-liquid microextraction and screen-printed carbon electrodes

Fernández

Vidal

Canals

2018

Talanta

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A novel approach is presented to determine hydrophilic phenols in olive oil samples, employing vortex-assisted reversed-phase dispersive liquid-liquid microextraction (RP-DLLME) for sample preparation and screen-printed carbon electrodes for voltammetric analysis. The oxidation of oleuropein, hydroxytyrosol, caffeic acid, ferulic acid and tyrosol was investigated, being caffeic acid and tyrosol selected for quantification. A matrix-matching calibration using sunflower oil as analyte-free sample diluted with hexane was employed to compensate matrix effects. Samples were analyzed under optimized RP-DLLME conditions, i.e., extractant phase, 1M HCl; extractant volume, 100µL; extraction time, 2min; centrifugation time, 10min; centrifugation speed, 4000rpm. The working range showed a good linearity between 0.075 and 2.5mgL (r = 0.998, N = 7) for caffeic acid, and between 0.075 and 3mgL (r = 0.999, N = 8) for tyrosol. The methodological limit of detection was empirically established at 0.022mgL for both analytes, which is significantly lower than average contents found in olive oil samples. The repeatability was evaluated at two different spiking levels (i.e., 0.5mgL and 2mgL) and coefficients of variation ranged from 8% to 11% (n = 5). The applicability of the proposed method was tested in olive oil samples of different quality (i.e., refined olive oil, virgin olive oil and extra virgin olive oil). Relative recoveries varied between 83% and 108% showing negligible matrix effects. Finally, fifteen samples were analyzed by the proposed method and a high correlation with the traditional Folin-Ciocalteu spectrophotometric method was obtained. Thereafter, the concentrations of the fifteen oil samples were employed as input variables in linear discriminant analysis in order to distinguish between olive oils of different quality.

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“…To avoid problems with regard to The second area where the detection limit concept is flawed is with regard to the lack of standard procedures. Many laboratories do not follow the IUPAC approach to detection limits (Long and Winefordner, 1983;Epstein, 1988). Different approaches can produce order of magnitude differences in estimates of detection limits.…”

Section: Limit Of Detection Conventionsmentioning

confidence: 99%

CONFLICTING PERSPECTWES ABOUT DETECTION LIMITS AND ABOUT THE CENSORING OF ENVIRONMENTAL DATA¹

Clark¹,

Whitfield

1994

J American Water Resour Assoc

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Current conventions for reporting analytical results from environmental samples brings the objectives of laboratory scientists into conflict with those of environmental scientists. The objective of chemical analyses is to provide estimates of the true composition of samples. Reported results must reflect the analytical uncertainty. Current conventions require left‐censoring of those results below the Limit of Detection. The objective of statistical interpretation of environmental data is to provide estimates of the characteristics of ecosystems. Such statistical analyses are often confounded by left‐censoring of analytical results. We review the different points of view and propose a compromise which recognizes these conflicting perspectives.

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Comparison of Detection Limits in Atomic Spectroscopic Methods of Analysis

Cited by 4 publications

References 12 publications

Trace Element Composition of Municipal Waters in the United States: A Comparison of ICP-AES and ICP-MS Methods

Trace Element Composition of Municipal Waters in the United States: A Comparison of ICP-AES and ICP-MS Methods

Rapid determination of hydrophilic phenols in olive oil by vortex-assisted reversed-phase dispersive liquid-liquid microextraction and screen-printed carbon electrodes

CONFLICTING PERSPECTWES ABOUT DETECTION LIMITS AND ABOUT THE CENSORING OF ENVIRONMENTAL DATA¹

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Comparison of Detection Limits in Atomic Spectroscopic Methods of Analysis

Cited by 4 publications

References 12 publications

Trace Element Composition of Municipal Waters in the United States: A Comparison of ICP-AES and ICP-MS Methods

Trace Element Composition of Municipal Waters in the United States: A Comparison of ICP-AES and ICP-MS Methods

Rapid determination of hydrophilic phenols in olive oil by vortex-assisted reversed-phase dispersive liquid-liquid microextraction and screen-printed carbon electrodes

CONFLICTING PERSPECTWES ABOUT DETECTION LIMITS AND ABOUT THE CENSORING OF ENVIRONMENTAL DATA1

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CONFLICTING PERSPECTWES ABOUT DETECTION LIMITS AND ABOUT THE CENSORING OF ENVIRONMENTAL DATA¹